(a) Draw an activation energy diagram for this reaction under catalyzed and uncatalyzed conditions and explain what it means for the activation energy to be lowered from 18 to 13 kcal/mol by ferric ions but from 18 to 7 kcal/mol by catalase. Please draw in the space provided below. (b) Suggest two properties of catalase that make it a more suitable intracellular catalyst than ferric ions.
(a) Draw an activation energy diagram for this reaction under catalyzed and uncatalyzed conditions and explain what it means for the activation energy to be lowered from 18 to 13 kcal/mol by ferric ions but from 18 to 7 kcal/mol by catalase. Please draw in the space provided below. (b) Suggest two properties of catalase that make it a more suitable intracellular catalyst than ferric ions.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:Q5) H2O2, decomposes to H2O and O2.
2H,O2→ 2H20 + O2
The activation energy, EA, for the uncatalyzed reaction at 20°C is 18 kcal/mol. The reaction can
be catalyzed either by ferric ions (EA 13 kcal/mol) or by the enzyme catalase (EA 7 kcal/mol).
(a) Draw an activation energy diagram for this reaction under catalyzed and uncatalyzed conditions
and explain what it means for the activation energy to be lowered from 18 to 13 kcal/mol by ferric
ions but from 18 to 7 kcal/mol by catalase. Please draw in the space provided below.
(b) Suggest two properties of catalase that make it a more suitable intracellular catalyst than ferric ions.
(c) Suggest yet another way that the rate of hydrogen peroxide decomposition can be
accelerated. Is this a suitable means of increasing reaction rates within cells? Why or why not?
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